https://www.amazon.com/dp/B01CHX06YC/ref=cm_sw_r_cp_apa_Rv5uzbVRTQF9Q

I've been using those in my Streamlights and Surefires(and other random lights) without a problem for over a year now. I've noticed that they don't last as long as a regular CR123, but it hardly matters since they're rechargable.

Surefire has the same warning, I honestly believe it's just because they both sell their own brand of batteries. Why would you buy their 12 pack for $16 when you can get 4 rechargables(which is effectively over 1000 batteries) for $25.